8433431664 has 40 divisors (see below), whose sum is σ = 24898704000. Its totient is φ = 2409551808.

The previous prime is 8433431663. The next prime is 8433431683. The reversal of 8433431664 is 4661343348.

It is a super-2 number, since 2×8433431664² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8433431663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12549414 + ... + 12550085.

It is an arithmetic number, because the mean of its divisors is an integer number (622467600).

Almost surely, 2^8433431664 is an apocalyptic number.

8433431664 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

8433431664 is an abundant number, since it is smaller than the sum of its proper divisors (16465272336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8433431664 is a wasteful number, since it uses less digits than its factorization.

8433431664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25099517 (or 25099511 counting only the distinct ones).

The product of its digits is 497664, while the sum is 42.

The square root of 8433431664 is about 91833.7174680411. The cubic root of 8433431664 is about 2035.4859550154.

The spelling of 8433431664 in words is "eight billion, four hundred thirty-three million, four hundred thirty-one thousand, six hundred sixty-four".